To Find: The sum of the given series.

The nth term of an AP series is given by

t_n = a + (n - 1)d

⇒191 = 2 + (n - 1)3

⇒3(n - 1) = 189

⇒n - 1 = 63

⇒n = 64

Therefore,

= 32 × 193 = 6176

The sum of the series is 6176.